Gday Sory if ive posted this in the wrong section ,as i cant see a section on electronics.

well ive had my HDS for a year or so now but still having trouble depicting the colour of the bottom ,i know theres a brief description about it in the manual but only basic info is given weak and strong.I live in Darwin and as i can workout most of the bottom round here well in the harbour,is mud with rock underneath .i use pallete 1 or 13 most of the time .Ineed to know please what you guys think ,what colour is weed and does it look like weed on the sounder ,i know that if a colour is thick it means a strong signal ,so indicating rock .Any info on this topic will be awesome .

Thanks Rob